This is only really true for HDDs, SSDs are much more complicated. Many mark and immediately clear blocks, but data that exists on blocks that are still in use can't be deleted without moving the in-use stuff to another blokc.
This is only really true for HDDs, SSDs are much more complicated. Many mark and immediately clear blocks, but data that exists on blocks that are still in use can't be deleted without moving the in-use stuff to another blokc.
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